Parts for your 2016 Toyota Hilux-Temperature sensors

2016 Toyota Hilux Temperature Sensors

Temperature sensors are absolutely fitted and used on the 2016 Toyota Hilux. Technical references that confirm this include the Toyota Hilux (AN120/AN130) Repair Manual (Engine/Control System sections for 1GD-FTV/2GD-FTV/2TR-FE), the Hilux Electrical Wiring Diagram (EWD) showing the ambient temperature sensor and instrument cluster inputs, and diagnostic trouble code charts such as P0115–P0119 (Engine Coolant Temperature), P0110 (Intake Air Temperature), P0070–P0073 (Ambient Temperature), transmission temperature codes, and exhaust gas temperature sensor checks used for DPF control on diesel models. Toyota service bulletins regarding DPF performance on GD-series diesels also reference multiple exhaust gas temperature (EGT) sensors.

In everyday terms, these sensors tell the ECU how hot things are so the ute runs sweet as. The engine coolant temperature (ECT) guides warm-up fuelling, ignition timing, glow plug and fan operation, the intake air temperature (IAT) helps calculate air density, the ambient sensor informs the A/C and dash display, automatic transmissions use fluid temperature for shift strategy, and diesel models rely on several EGT sensors to manage the DPF. Some variants also monitor fuel and intercooler temps. Together, they protect the engine, keep emissions in check, and help fuel economy.

• Common Hilux temperature sensors: ECT (at/near the thermostat housing or cylinder head), IAT (in the MAF/MAP assembly), ambient air temp (in the front bumper/grille), auto transmission fluid temp (in the valve body), diesel EGT sensors (pre- and post-turbo, across the DPF), and fuel temperature (common rail/return line on diesels).

As part of regular servicing, there’s no scheduled replacement for these sensors, but it pays to check they’re reading sensibly on a scan tool. Cold ECT should be near ambient, IAT close to under-bonnet temperature, ambient matches the day’s temperature, auto trans temp rises smoothly, and EGTs behave predictably during a regen. Watch for warning lights, hard cold starts, rich running, fans stuck on, poor A/C performance, or excessive fuel use.

Quick care tips owners appreciate: keep the cooling system healthy with the correct Toyota Super Long Life Coolant, fix any coolant leaks promptly, and bleed air after ECT work. Keep intake plumbing sealed and the MAF/IAT clean (use proper MAF cleaner, not throttle-body spray). Inspect connectors for corrosion, especially the ECT near the thermostat housing, the ambient sensor behind the grille, and the EGT harness near the DPF where heat can bake the loom. If replacement is needed, use genuine or quality aftermarket parts, handle sensors by the body (not the tip), and clear DTCs while verifying live data. A brief test drive to confirm stable readings is the final tick.

Where are the temperature sensors on a 2016 Hilux?

Most owners will find the coolant temp sensor screwed into or clipped near the thermostat housing on the head. The IAT is integrated with the MAF/MAP unit in the intake. The ambient sensor sits behind the grille or bumper reinforcement. Auto transmissions read temp internally, and diesel EGT sensors are mounted in the exhaust stream before/after the turbo and across the DPF.

What are the signs of a bad coolant temperature sensor?

Common clues include hard cold starts, rich running, black smoke on diesels, the radiator fans running constantly, poor fuel economy, and a check engine light with codes like P0115–P0119. On a scan tool, you might see an implausible ECT reading (e.g., -40°C or 130°C) straight after a cold start. Fix wiring/connectors first, if readings are still off, replace the sensor and bleed the cooling system.

Do temperature sensors need regular replacement?

Not on a time basis. They’re replaced when faulty or damaged. During routine services, a quick visual of the connectors and a health check of live data is enough. If the ute has been off-road in mud or had front-end repairs, re-check the ambient and EGT wiring. Using the correct coolant and keeping the intake clean helps the sensors live a long, drama-free life.